Device for slitting narrow PET (Polyethylene Terephthalate) film

Abstract

The utility model belongs to the technical field of narrow PET film production equipment, and particularly relates to a narrow PET film slitting device. The device comprises a feeding mechanism, a cutting mechanism and a cutting mechanism, wherein the feeding mechanism is positioned at the inlet end of the cutting mechanism; the slitting mechanism comprises a rack, and the rack is provided with a working table top and supports located on the two sides of the working table top. The multiple pairs of conveying rollers are arranged in the working table top at intervals, and the tangent line of each pair of conveying rollers and the working table top are located on the same horizontal plane; and the cutter assemblies are arranged on the support, each cutter assembly is located between the two adjacent pairs of conveying rollers, and the height of each cutter assembly is adjustable. The PET film slitting device is used for solving the technical problem that slitting equipment in the prior art cannot meet the slitting requirements of PET films.

Description

Technical Field

[0001] This utility model belongs to the technical field of narrow strip PET film production equipment, specifically relating to a device for cutting narrow strip PET film. Background Technology

[0002] Existing slitting equipment is generally used for slitting film products. The film is wound onto a conveyor shaft and then slit using slitting blades. However, for PET films that need slitting, due to their thickness and inherent rigidity, PET films cannot be wound onto existing slitting equipment, making slitting impossible. Furthermore, there are generally two slitting requirements for PET films: one is to completely sever the PET film, and the other is to partially slit it, leaving slight cuts between adjacent narrow strips, preserving the film intact before tearing. However, the blades on existing slitting equipment can only perform one type of slitting. Changing to the other method requires replacing the blade, which is time-consuming and labor-intensive. Utility Model Content

[0003] This invention provides a device for slitting narrow strips of PET film, which solves the technical problem that existing slitting equipment cannot meet the slitting requirements of PET film.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for slitting narrow strips of PET film, comprising:

[0005] A feeding mechanism, which is located at the inlet end of the slitting mechanism;

[0006] The slitting mechanism includes:

[0007] A frame, the frame having a worktable and supports located on both sides of the worktable;

[0008] Several pairs of conveying rollers are spaced apart within the worktable surface, and the tangent of each pair of conveying rollers is at the same horizontal plane as the worktable surface.

[0009] At least two sets of cutter assemblies are provided, each set of cutter assemblies is located between two adjacent pairs of conveyor rollers, and the height of each set of cutter assemblies is adjustable.

[0010] This invention utilizes multiple pairs of conveying rollers spaced apart to stably transport PET film and overcome the warping of PET film. The multiple pairs of conveying rollers are distributed on both sides of the cutting assembly, which can stably position and transport the PET film, preventing the narrow strips of PET film after being cut by the cutting assembly from scattering, and eliminating the need to rewind the PET film.

[0011] Furthermore: the feeding mechanism is a conveyor belt, and the feeding mechanism also includes a robotic arm and a material rack;

[0012] The material rack is located on one side of the conveyor belt, and PET film is placed on the material rack;

[0013] The robotic arm is located on one side of the material rack, and the range of motion of the robotic arm covers the conveyor belt and the material rack. The end of the robotic arm is a suction rack with several vacuum suction cups.

[0014] The benefits of this step include: using a robotic arm equipped with several vacuum suction cups for material loading, thus achieving automated control.

[0015] Furthermore: the inner side of the bracket is provided with a guide block, and the outer side of the guide block includes a slope at the inlet end and a vertical surface at the far end, with the slope and the vertical surface smoothly transitioning;

[0016] The guide block is mounted on the bracket via a screw and a slide bar. The screw and the slide bar are horizontally positioned, with the end of the screw movably connected to the guide block and the end of the slide bar fixedly connected to the guide block.

[0017] The benefits of this step are: during the feeding process, the PET film may be deflected. The guide block can reset the deflected PET film, thereby ensuring the slitting quality.

[0018] Furthermore, the length of the slide rod is less than the length of the screw, and the tail end of the slide rod is provided with a limiting structure.

[0019] The benefits of this step are: when adjusting the screw length, the handwheel at the front end of the screw will not interfere with the slide bar; the limiting structure prevents the slide bar from falling out of the bracket.

[0020] Furthermore, the cutting types of the two sets of cutting assemblies are circular cutter and point-cut circular cutter, respectively.

[0021] The benefits of this step are: the circular cutter achieves complete slitting, and the point-cutting circular cutter achieves point-cutting marks.

[0022] Furthermore: the cutting assembly includes a gantry beam, a cutter shaft, and a plurality of the cutting blades;

[0023] The gantry beam and the support are connected by a dovetail groove. The top surface of the gantry beam is equipped with a motor, and the bottom of the gantry beam is equipped with a cutter shaft. The motor is connected to the cutter shaft in a transmission connection, and the support is provided with a clearance groove corresponding to the position of the cutter shaft.

[0024] The cutter shaft is provided with a plurality of cutters arranged at intervals.

[0025] The benefits of this step include: adjusting the distance between the cutter assembly and the worktable by adjusting the gantry beam to accommodate PET films of different thicknesses.

[0026] Furthermore: the side of the gantry beam and the side of the bracket are provided with a number of positioning holes, and the positioning holes are equipped with positioning pins;

[0027] Alternatively, the side of the gantry beam is provided with straight teeth, and the side of the bracket is provided with a worm gear or gear that meshes with the straight teeth, and the worm gear or gear is driven by a rotating shaft.

[0028] The beneficial effect of this step is that the height of the gantry beam can be adjusted using the methods described above.

[0029] The beneficial effects of this utility model are:

[0030] 1. This application utilizes multiple pairs of conveyor rollers to transport PET film in a planar manner, eliminating the need to wind PET film. Furthermore, multiple pairs of conveyor rollers transport PET film simultaneously. When the cutting assembly cuts the PET film into narrow strips, the narrow strips are controlled in the front and back and will not scatter.

[0031] 2. Different cutting blade components can provide different cutting marks, and there is no need to change the blade. You only need to adjust the working position of different cutting blade components, which saves time and effort. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the structure of a device for slitting narrow strips of PET film provided by this utility model. Figure 1 ;

[0034] Figure 2 A schematic diagram of the structure of a device for slitting narrow strips of PET film provided by this utility model. Figure 2 ;

[0035] Figure 3 A three-dimensional schematic diagram of the guide block in a device for slicing narrow strips of PET film provided by this utility model;

[0036] Figure label:

[0037] 1-Frame; 2-Conveyor roller; 3-Cutter assembly; 4-Guide block; 5-Conveyor belt; 6-Material rack; 7-Robotic arm; 8-PET film;

[0038] 11-Workbench; 12-Support; 31-Gantry beam; 32-Cutter; 33-Motor; 41-Screw; 42-Slide rod;

[0039] 311-Dovetail groove. Detailed Implementation

[0040] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0041] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Example

[0044] like Figures 1-3 As shown, the device for slitting narrow strips of PET film provided by this utility model includes:

[0045] A feeding mechanism, which is located at the inlet end of the slitting mechanism;

[0046] The slitting mechanism includes:

[0047] The frame 1 is provided with a worktable 11 and supports 12 located on both sides of the worktable 11;

[0048] Several pairs of conveyor rollers 2 are spaced apart within the worktable 11, and the tangent of each pair of conveyor rollers 2 is at the same horizontal plane as the worktable 11, so that the PET film 8 can be completely adhered to the worktable 11. Of course, the worktable 11 has clearance notches at the positions corresponding to the conveyor rollers 2.

[0049] At least two sets of cutting blade assemblies 3 are provided, each set of cutting blade assemblies 3 is located between two adjacent pairs of conveying rollers 2, and the height of each set of cutting blade assemblies 3 is adjustable. The worktable 11 is used as an anvil for cutting PET film 8, which facilitates the cutting of PET film by the cutting blade assemblies 3 and prevents the cut edge of PET film from deforming.

[0050] This invention utilizes multiple pairs of conveying rollers 2 arranged at intervals to stably convey the PET film 8 and overcome the warping of the PET film 8, ensuring that the PET film can be flattened. The multiple pairs of conveying rollers 2 are distributed on both sides of the cutting assembly 3, which can stably position and convey the PET film 8, preventing the narrow strips of PET film after being cut by the cutting assembly 3 from scattering, and eliminating the need to wind the PET film.

[0051] In one embodiment, the feeding mechanism is a conveyor belt 5, and the feeding mechanism also includes a robotic arm 7 and a material rack 6;

[0052] The material rack 6 is located on one side of the conveyor belt 5, and PET film 8 is placed on the material rack 6;

[0053] The robotic arm 7 is located on one side of the material rack 6, and the range of motion of the robotic arm 7 covers the conveyor belt 5 and the material rack 6. The end of the robotic arm 7 is a suction rack with several vacuum suction cups.

[0054] In this embodiment, a robotic arm 7 equipped with several vacuum suction cups is used for loading, thereby achieving automated control.

[0055] In one embodiment, the inner side of the bracket 12 is provided with a guide block 4, and the outer side of the guide block 4 includes a slope at the inlet end and a vertical surface at the far end, wherein the slope and the vertical surface are smoothly transitioned.

[0056] The guide block 4 is mounted on the bracket 12 via a screw 41 and a slide rod 42. The screw 41 and the slide rod 42 are horizontally positioned to ensure that the guide block 4 does not rotate and remains horizontal. The end of the screw 41 is movably connected to the guide block 4, and the end of the slide rod 42 is fixedly connected to the guide block 4. A handwheel for rotation can also be provided at the other end of the screw 41.

[0057] During the feeding process, the PET film 8 may deviate in position. The guide block 4 can reset the deviated PET film 8, allowing it to enter the conveyor roller 2 vertically, thus ensuring the slitting quality. In addition, different specifications of PET film 8 have different widths. The positioning requirements of PET film 8 with different widths can be met by adjusting the relative distance between the two guide blocks 4.

[0058] Based on the above embodiments, the length of the slide rod 42 can be less than the length of the screw 41, and the tail end of the slide rod 42 is provided with a limiting structure, which is generally a bend, a ring, etc.

[0059] The two have different lengths, and their function is to prevent the handwheel at the front end of the screw 41 from interfering with the slide bar 42 when adjusting the length of the screw 41; the limiting structure is to prevent the slide bar 42 from falling out of the bracket 12.

[0060] In one embodiment, the two sets of cutting blade assemblies 3 have cutting blade types of circular blade and point-cutting circular blade, respectively.

[0061] A circular cutter achieves complete slitting, while a point-cutting circular cutter creates point-cutting marks.

[0062] Specifically, such as Figure 1 and Figure 2 As shown, the cutting assembly 3 includes a gantry beam 31, a cutting shaft, and a plurality of cutting blades 32;

[0063] The gantry beam 31 and the support 12 are connected by a dovetail groove 311, which ensures motion accuracy. A motor 33 is provided on the top surface of the gantry beam 31, and a cutter shaft is provided at the bottom of the gantry beam 31. The cutter shaft is connected to the side of the gantry beam 31 by a bearing. The motor 33 is connected to the cutter shaft by a drive, generally by chain drive or belt drive, and the support 12 has a clearance groove corresponding to the position of the cutter shaft.

[0064] The cutter shaft is provided with a plurality of cutters 32 arranged at intervals. The cutters 32 are locked on the cutter shaft in accordance with the prior art, and the position of the cutters 32 is adjustable.

[0065] The distance between the cutter assembly 3 and the worktable 11 can be adjusted by adjusting the gantry beam 31 to accommodate PET films of different thicknesses.

[0066] Based on the above technical solution, a number of positioning holes are provided on the side of the gantry beam 31 and the side of the bracket 12, and the positioning holes are equipped with positioning pins.

[0067] Alternatively, the side of the gantry beam 31 is provided with straight teeth, and the side of the bracket 12 is provided with a worm gear or gear that meshes with the straight teeth, and the worm gear or gear is driven by a rotating shaft.

[0068] The height of the gantry beam 31 can be adjusted using the above methods.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An apparatus for slitting narrow strip PET film, characterized in that, The utility model relates to a kind of PET film cutting machine, including: Feeding mechanism, the feeding mechanism is located in the inlet end of slitting mechanism; The slitting mechanism includes: Frame, the frame is equipped with workbench and support located at both sides of the workbench; Several pairs of conveying rollers, several pairs of the conveying roller are spaced apart in the workbench, and the tangent line of each pair of the conveying roller is in the same horizontal plane with the workbench; At least two groups of cutter assemblies, the cutter assembly is arranged on the support, and each group of the cutter assembly is located between adjacent two pairs of the conveying roller, and the height of each group of the cutter assembly is adjustable.

2. The apparatus for slitting and trimming a PET film according to claim 1, wherein, The feeding mechanism is a conveying belt, and the feeding mechanism further includes a mechanical arm and a rack; The rack is located on one side of the conveying belt, and PET film is placed on the rack; The mechanical arm is located on one side of the rack, and the activity range of the mechanical arm covers the conveying belt and the rack, and the end of the mechanical arm is a suction rack with a plurality of vacuum suction cups.

3. The apparatus for slitting and trimming a PET film according to claim 1, wherein, The inner side of the support is provided with a guide block, the outer side surface of the guide block includes a slope surface of the inlet end and a vertical surface of the distal end, and the slope surface and the vertical surface are smoothly transitioned. The guide block is arranged on the support through a screw rod and a slide rod, the screw rod and the slide rod are horizontally arranged, the end of the screw rod is movably connected with the guide block, and the end of the slide rod is fixedly connected with the guide block.

4. The apparatus for slitting and trimming a PET film according to claim 3, wherein, The length of the slide rod is less than the length of the screw rod, and the tail end of the slide rod is provided with a limiting structure.

5. The apparatus for slitting and trimming PET film of claim 1, wherein, The cutter types of the two groups of cutter assemblies are round knives and point-cut round knives respectively.

6. The apparatus for slitting and trimming a PET film according to claim 5, wherein, The cutter assembly includes a gantry beam, a knife shaft and a plurality of cutters. The gantry beam and the support are connected through dovetail grooves, the top surface of the gantry beam is provided with a motor, the bottom of the gantry beam is provided with a knife shaft, the motor is drivingly connected with the knife shaft, and the support is provided with a clearance groove corresponding to the position of the knife shaft. A plurality of cutters are arranged on the knife shaft in an interval.

7. The apparatus for slitting and trimming a PET film according to claim 6, wherein, A plurality of positioning holes are formed in the side surface of the gantry beam and the side surface of the support, and the positioning holes are provided with positioning pins. Alternatively, the side surface of the gantry beam is provided with a straight tooth, the side surface of the support is provided with a worm gear or a gear meshing with the straight tooth, and the worm gear or the gear is driven through a rotating shaft.

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